"I don't know," Art replied. "I only wish I had time to work this out, to get some of these things in the lab and analyze them--it would help so much to know what we're fighting." Art decided he would stop at the laboratory on the way back, and see if Dr. Theller had been able to find out anything of the nature of the specimen he had left behind. As he entered, he saw that the place was strangely deserted. Dr. Theller and Elene he found in the former's office, however. "I counted on your stopping in," said the Institute head as Art came in. "Things are in pretty serious shape all over. You did a great job in Los Angeles. Now I'm going to ask you to repeat that performance--" "Detroit?" Art interrupted. "No--I've already sent several good men there. You don't realize how this thing has spread. In the last hour, Singapore, Cairo and Athens have all called us. London, in fact, the whole of southeastern England, is stricken. The British Foundation has some fine men, however; they think they'll be able to handle it." "Dr. Theller, must he leave at once?" asked Elene, with an anxious look at Art's weary face. "I'll be all right, Elene," Art assured her. "A hot shower, hot drink, and a transfusion of supervitalized plasma, and I'll never know I missed a night's sleep. I've been eating a food tablet every now and then, so I'm not at all hungry." "All right, Art, you get fixed up--then you're off for Cairo. I'll have the commissary issue you some more disintegrators. I wouldn't ask you to do this, but every minute counts. I'm thinking of taking off for Athens and leaving Elene in charge, myself." "Oh, I almost forgot to ask you, Dr. Theller, have you examined the specimen here yet?" A chagrined look came over the scientist's face. "Well, I hate to admit this, Art, but the thing escaped in the confusion. Don't see how it could have gotten very far away. I'll have some of the men look around the grounds for it." Art shook his head slowly as he went out. Such incompetency seemed unlike the aged savant, but he guessed that inactivity had taken its toll of the old man. III The week following was a long, hideous nightmare, during which Art flew from city to city, fighting the ghastly scourge which was cropping up more and more rapidly, all over the globe. Vladivostok, Berlin, Cuba--he could hardly remember them all. He was glad he could not sleep, because he knew his dreams would be tortured by visions of men and women being cut to ribbons by millions of rending jaws. It was dreadfully apparent to Art what was happening. The creatures appeared in a particular area almost simultaneously. Every bit of life was wiped out, except for perhaps a few small shrubs and grasses. Huge trees, buildings, even mountains, all came crashing down. All sources of food supply were wiped out. The creatures could be cleared from the ground by disintegration, but more soon came to take their place.